Effect: Attacks cause enemy units to store 12% of damage dealt, after 8 seconds this stored damage is dealt to affected enemy
250g Gold
Blazing Fire Opal
1.80 Cooldown
250 - 300 Ruby Damage
800 Range
Effect: Attacks cause enemy units to store 20% of damage dealt, after 6 seconds apply this stored damage to up to 4 nearby enemys as a dot that deals damage over 4 seconds
EDIT: To clarify, the tower would store damage from all towers not just the damage dealt by the fire opal
Fire Opal
Ruby Flawless Ruby Perfect Opal
2.00 Cooldown 200 - 250 Ruby Damage 800 Range
Effect: Attacks cause enemy units to store 12% of damage dealt, after 8 seconds this stored damage is dealt to affected enemy
250g Gold Blazing Fire Opal
1.80 Cooldown 250 - 300 Ruby Damage 800 Range
Effect: Attacks cause enemy units to store 20% of damage dealt, after 6 seconds apply this stored damage to up to 4 nearby enemys as a dot that deals damage over 4 seconds
EDIT: To clarify, the tower would store damage from all towers not just the damage dealt by the fire opal